CN108597795B - Amorphous dry-type transformer - Google Patents
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- CN108597795B CN108597795B CN201810332407.2A CN201810332407A CN108597795B CN 108597795 B CN108597795 B CN 108597795B CN 201810332407 A CN201810332407 A CN 201810332407A CN 108597795 B CN108597795 B CN 108597795B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/25—Magnetic cores made from strips or ribbons
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C45/02—Amorphous alloys with iron as the major constituent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/153—Amorphous metallic alloys, e.g. glassy metals
- H01F1/15341—Preparation processes therefor
- H01F1/1535—Preparation processes therefor by powder metallurgy, e.g. spark erosion
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- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0213—Manufacturing of magnetic circuits made from strip(s) or ribbon(s)
- H01F41/0226—Manufacturing of magnetic circuits made from strip(s) or ribbon(s) from amorphous ribbons
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Abstract
The invention provides an amorphous dry-type transformer, which comprises a high-voltage coil, a low-voltage coil and an amorphous alloy iron core, wherein the amorphous alloy iron core is formed by winding an amorphous strip, and the amorphous strip is prepared by the following steps: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100‑a‑b‑c‑d‑e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and performing a second heat treatment on the amorphous alloy strip. The amorphous alloy has the advantages of high saturation magnetization, low coercive force, high resistance value, strong amorphous forming capability and excellent comprehensive performance.
Description
Technical Field
The invention relates to the field of amorphous alloy, in particular to an amorphous dry-type transformer.
Background
Along with the development of national economy and modernization level of China, the urbanization rate of China is higher and higher. Along with the development of urbanization, the population is more and more dense, the business is more and more developed, and places with higher requirements on fire prevention, such as superstores, railway stations, hospitals, airports, subways and the like, are more and more, so people have higher requirements on the safety performance of the transformer. Oil filled transformers are not suitable for use in such locations because of the danger of explosion and fire of the transformer oil due to operational failure. The dry type transformer does not have similar dangers, and the insulating materials of the dry type transformer are all fire-retardant materials, so that even if a fire disaster occurs in the operation, the fire disaster situation cannot be enlarged. Therefore, the application range of dry-type transformers which are safe and reliable to operate and simple to maintain is continuously expanding. Meanwhile, along with the continuous deepening of energy-saving and consumption-reducing policies, the nation encourages the development of energy-saving distribution transformers more and more. The amorphous alloy transformer using the amorphous alloy to replace the traditional silicon steel sheet as the iron core has the obvious characteristic of low no-load loss. The no-load loss of the amorphous alloy transformer is reduced by about 80 percent compared with that of an S9 series transformer; the no-load loss of the distribution transformer of the S11 series which is widely used in China at present is 20 percent lower than that of the distribution transformer of the S9 series; the no-load loss of the popularized S13 series transformer is 25% lower than that of the S9 series transformer. The comparison shows that the amorphous alloy transformer has obvious energy-saving effect. The amorphous alloy dry type transformer integrates the characteristics of the dry type transformer and the amorphous alloy transformer, not only can meet the safety requirements of high fire resistance, explosion resistance and the like required by urbanization development, but also meets the national advices of energy conservation and environmental protection. Therefore, the popularization of the amorphous alloy dry-type transformer has important significance.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide an amorphous dry-type transformer which has high saturation magnetization, strong amorphous forming capability and excellent comprehensive performance.
The invention provides an amorphous dry-type transformer, which comprises a high-voltage coil, a low-voltage coil and an amorphous alloy iron core, wherein the amorphous alloy iron core is formed by winding an amorphous strip, and the amorphous strip is prepared by the following steps: providing pure Fe,FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and performing a second heat treatment on the amorphous alloy strip.
Preferably, in the above technical solution, a is 6 to 8, b is 5 to 7, c is 1 to 2, d is 8 to 10, and e is 2 to 4.
Preferably, in the above technical scheme, when the material to be used is placed in a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw material are first placed in the crucible, then pure B is laid on the pure Fe, FeSi alloy and pure Cu raw material, and finally pure Co and pure Gd are placed on the pure B.
Preferably, in the technical scheme, the vacuum melting time is 30-40min, and the material is turned at least 5-8 times in the melting process.
Preferably, in the above technical solution, the first heat treatment specifically includes: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 300-400 ℃, and the heat treatment time is 30-40 min.
Preferably, in the above technical scheme, the single-roll quenching process specifically comprises: the vacuum degree is better than 0.01Pa, the rotating speed of the copper roller is 3000-4000r/min, the width of the strip is 1-2cm, the injection pressure is 0.06-0.08MPa, and the injection temperature is 1000-1200 ℃.
Preferably, in the above technical solution, the second heat treatment specifically includes: the heat treatment temperature is 200-300 ℃, and the heat treatment time is 8-10 h.
Compared with the prior art, the invention has the following beneficial effects: as mentioned above, dry-type amorphous transformers have great advantages compared to other types of transformers, but currently, the development of amorphous dry-type transformers is greatly limited due to the low performance parameters of amorphous alloys. The defects of the existing amorphous alloy are as follows: the amorphous forming ability is poor, the wide band can not be prepared by a single-roller quenching method, and the industrial application requires that the amorphous alloy strip has larger bandwidth. Amorphous magnetic property is poor, it is known that it is almost impossible to prepare amorphous pure iron by using a single-roll quenching method, so in order to form an amorphous alloy, a very magnetic element needs to be added into the alloy, which causes the magnetism of an amorphous strip to be reduced, and how to improve the magnetic property of the amorphous alloy is also a big problem at present. The invention provides a novel amorphous alloy and a preparation method thereof, aiming at solving the difficulties in the prior art, and the alloy has the advantages of high saturation magnetization, low coercive force, high resistance value, strong amorphous forming capability and excellent comprehensive performance.
Drawings
Fig. 1 is a schematic structural view of a dry type amorphous transformer according to the prior art.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Fig. 1 is a schematic structural view of a dry type amorphous transformer according to the prior art. As shown in fig. 1, the dry amorphous transformer in the prior art includes a high-voltage coil 1, a low-voltage coil 2, an amorphous alloy iron core 3, an iron core pulling plate 4, a coil insulation pressing block 5, an iron core clamping piece 6 and a transformer base 7, wherein the high-voltage coil 1 and the low-voltage coil 2 are elliptical.
Example 1
The amorphous alloy iron core according to a preferred embodiment of the present invention is formed by winding an amorphous strip, and the amorphous strip is prepared by the steps of: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and performing a second heat treatment on the amorphous alloy strip.
Wherein, a is 6, b is 5, c is 1, d is 8, and e is 2. When the materials to be used are put into a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw materials are firstly put into the crucible, then pure B is paved on the pure Fe, FeSi alloy and pure Cu raw materials, and finally pure Co and pure Gd are put on the pure B. Wherein the vacuum melting time is 30min, and the material is turned for at least 5 times in the melting process. The first heat treatment specifically comprises: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 300 ℃, and the heat treatment time is 40 min. The single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of a copper roller is 3000r/min, the width of a strip is 1cm, the injection pressure is 0.06Mpa, and the injection temperature is 1000 ℃. The second heat treatment specifically comprises: the heat treatment temperature is 200 ℃, and the heat treatment time is 10 h.
Example 2
The amorphous alloy iron core according to a preferred embodiment of the present invention is formed by winding an amorphous strip, and the amorphous strip is prepared by the steps of: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and subjecting the amorphous alloy strip to the second stepAnd (5) performing heat treatment.
Wherein, a is 8, b is 7, c is 2, d is 10, and e is 4. When the materials to be used are put into a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw materials are firstly put into the crucible, then pure B is paved on the pure Fe, FeSi alloy and pure Cu raw materials, and finally pure Co and pure Gd are put on the pure B. Wherein the vacuum melting time is 40min, and the material is turned at least 8 times in the melting process. The first heat treatment specifically comprises: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 400 ℃, and the heat treatment time is 30 min. The single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of a copper roller is 4000r/min, the width of a strip is 2cm, the injection pressure is 0.08Mpa, and the injection temperature is 1200 ℃. The second heat treatment specifically comprises: the heat treatment temperature is 300 ℃, and the heat treatment time is 8 h.
Example 3
The amorphous alloy iron core according to a preferred embodiment of the present invention is formed by winding an amorphous strip, and the amorphous strip is prepared by the steps of: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and performing a second heat treatment on the amorphous alloy strip.
Where, a is 7, b is 6, c is 1.5, d is 9, and e is 3. When the materials to be used are put into a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw materials are firstly put into the crucible, then pure B is paved on the pure Fe, FeSi alloy and pure Cu raw materials, and finally pure Co and pure Gd are put on the pure B. Wherein the vacuum melting time is 35min, and the material needs to be turned over at least 6 times in the melting process. The first heat treatment specifically comprises: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 350 ℃, and the heat treatment time is 35 min. The single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of the copper roller is 3500r/min, the width of the strip is 1.5cm, the injection pressure is 0.07Mpa, and the injection temperature is 1100 ℃. The second heat treatment specifically comprises: the heat treatment temperature is 250 ℃, and the heat treatment time is 9 h.
Example 4
An amorphous alloy core according to another preferred embodiment of the present invention is formed by winding an amorphous strip, the amorphous strip being prepared by the steps of: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and carrying out second heat treatment on the amorphous alloy strip.
Wherein, a is 10, b is 10, c is 3, d is 5, and e is 1. When the materials to be used are put into a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw materials are firstly put into the crucible, then pure B is paved on the pure Fe, FeSi alloy and pure Cu raw materials, and finally pure Co and pure Gd are put on the pure B. Wherein the vacuum melting time is 35min, and the material needs to be turned over at least 6 times in the melting process. The first heat treatment specifically comprises: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 350 ℃, and the heat treatment time is 35 min. The single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of the copper roller is 3500r/min, the width of the strip is 1.5cm, the injection pressure is 0.07Mpa, and the injection temperature is 1100 ℃. The second heat treatment specifically comprises: the heat treatment temperature is 250 ℃, and the heat treatment time is 9 h.
Example 5
An amorphous alloy core according to another preferred embodiment of the present invention is formed by winding an amorphous strip, the amorphous strip being prepared by the steps of: providing pure Fe, FeSiGold, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and performing a second heat treatment on the amorphous alloy strip.
Where, a is 7, b is 6, c is 1.5, d is 9, and e is 3. When the materials to be used are put into a crucible of a vacuum melting furnace, all the raw materials are uniformly mixed and then put into the crucible. Wherein the vacuum melting time is 60min, and the material is turned at least 2 times in the melting process. The first heat treatment specifically comprises: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 350 ℃, and the heat treatment time is 35 min. The single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of the copper roller is 3500r/min, the width of the strip is 1.5cm, the injection pressure is 0.07Mpa, and the injection temperature is 1100 ℃. The second heat treatment specifically comprises: the heat treatment temperature is 250 ℃, and the heat treatment time is 9 h.
Example 6
The amorphous alloy iron core according to a preferred embodiment of the present invention is formed by winding an amorphous strip, and the amorphous strip is prepared by the steps of: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; subjecting the amorphous alloy ribbon to a second heatAnd (6) processing.
Where, a is 7, b is 6, c is 1.5, d is 9, and e is 3. When the materials to be used are put into a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw materials are firstly put into the crucible, then pure B is paved on the pure Fe, FeSi alloy and pure Cu raw materials, and finally pure Co and pure Gd are put on the pure B. Wherein the vacuum melting time is 35min, and the material needs to be turned over at least 6 times in the melting process. The first heat treatment specifically comprises: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 500 ℃, and the heat treatment time is 50 min. The single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of the copper roller is 3500r/min, the width of the strip is 1.5cm, the injection pressure is 0.07Mpa, and the injection temperature is 1100 ℃. The second heat treatment specifically comprises: the heat treatment temperature is 400 ℃, and the heat treatment time is 12 h.
Example 7
An amorphous alloy core according to another preferred embodiment of the present invention is formed by winding an amorphous strip, the amorphous strip being prepared by the steps of: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; according to the formula Fe(100-a-b-c-d-e)SiaBbCucCodGdeWeighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and performing a second heat treatment on the amorphous alloy strip.
Where, a is 7, b is 6, c is 1.5, d is 9, and e is 3. When the materials to be used are put into a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw materials are firstly put into the crucible, then pure B is paved on the pure Fe, FeSi alloy and pure Cu raw materials, and finally pure Co and pure Gd are put on the pure B. Wherein the vacuum melting time is 35min, and the material needs to be turned over at least 6 times in the melting process. The first heat treatment specifically comprises: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 350 ℃, and the heat treatment time is 35 min. The single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of a copper roller is 5000r/min, the width of a strip is 3cm, the injection pressure is 0.1Mpa, and the injection temperature is 1300 ℃. The second heat treatment specifically comprises: the heat treatment temperature is 250 ℃, and the heat treatment time is 9 h.
Saturation magnetization and coercivity tests were performed on examples 1-7 and the experimental results of all examples were compared to example 1 for ease of comparison.
TABLE 1
| Saturation magnetization | Coercive force | |
| Example 1 | 100％ | 100％ |
| Example 2 | 104％ | 108％ |
| Example 3 | 109％ | 106％ |
| Example 4 | 73％ | 76％ |
| Example 5 | 75％ | 73％ |
| Example 6 | 72％ | 77％ |
| Example 7 | 71％ | 75％ |
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. The utility model provides an amorphous dry-type transformer, amorphous dry-type transformer includes high-voltage coil, low-voltage coil and amorphous alloy iron core, its characterized in that: the amorphous alloy iron core is formed by winding an amorphous strip, and the amorphous strip is prepared by the following steps: providing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials; weighing pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd according to the molecular formula of Fe (100-a-B-c-d-e) SiaBbCucCodGde; cleaning and drying the weighed pure Fe, FeSi alloy, pure B, pure Cu, pure Co and pure Gd raw materials to obtain a material to be used; putting the materials to be used into a crucible of a vacuum smelting furnace; carrying out vacuum melting on the material to be used to obtain a master alloy; carrying out first heat treatment on the master alloy; preparing an amorphous alloy strip by using the master alloy subjected to the first heat treatment as a raw material and using a single-roller quenching method; and performing a second heat treatment on the amorphous alloy strip,
when the material to be used is put into a crucible of a vacuum melting furnace, pure Fe, FeSi alloy and pure Cu raw materials are firstly put into the crucible, pure B is then laid on the pure Fe, FeSi alloy and pure Cu raw materials, and pure Co and pure Gd are finally put on the pure B, wherein the vacuum melting time is 35min, and the material needs to be turned over at least 6 times in the melting process, and the first heat treatment specifically comprises the following steps: the heat treatment atmosphere is hydrogen atmosphere, the heat treatment temperature is 350 ℃, the heat treatment time is 35min, and the single-roller quenching process specifically comprises the following steps: the vacuum degree is better than 0.01Pa, the rotation speed of the copper roller is 3500r/min, the width of the strip is 1.5cm, the injection pressure is 0.07Mpa, the injection temperature is 1100 ℃, and the second heat treatment specifically comprises the following steps: the heat treatment temperature is 250 ℃, and the heat treatment time is 9 h.
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